The Prison Congress of Rome naturally did not accept the principle of punishment for unfixed periods. More than that, advancing on the classical tendency, it decided that ``the law should fix the maximum of punishment beyond which the judge may not in any case go; and also the minimum, which however may be diminished when the judge considers that the crime was accompanied by extenuating circumstances not foreseen by the law.'' It is only of late years, in consequence of the reaction <p 213>against short terms of imprisonment, that the principle of segregation for unfixed periods has been developed and accepted by various writers, in spite of the feeble objections of Tallack, Wahlberg, Lamezan, von Jagemann, &c. Apart, also, from theoretical discussion, this principle has been applied in a significant manner in the United States, by means of the ``indeterminate sentence.'' The House of Correction at Elmira (New York) for young criminals carries into effect, with special regulations of physical and moral hygiene, the indeterminate imprisonment of young prisoners; and this principle, approved by the Prison Congresses at Atalanta{sic} (1887), Buffalo (1888), and Nashville (1889), has been applied also in the New York prisons, and in the States of Massachusetts, Pennsylvania, Minnesota, and Ohio. M. Liszt proposes that the indeterminate character of punishment should be only relative, that is to say, limited between a minimum and a maximum, these being laid down in the sentence of the judge. Special commissions for supervising the administration of punishment, consisting of the Governor of the prison, the Public Prosecutor, the judge who heard the case, and two members nominated by Government (instead of the court which passed sentence, as proposed by Villert and Van Hamel), should decide on the actual duration of the punishment, after having examined the convict and his record. Thus these commissions would be able to liberate at once (with or without conditions) or to order a prolongation of punishment, especially for habitual criminals. <p 214> With the formation of these commissions there might be associated the prison studies and aid of discharged prisoners referred to on a former page.